Fiorella has always had a sorrow for dead deer on the side of the road and a poor opinion of the people who ran them down--until she herself almost hit a little doe who sprang out of nowhere. Thank goodness, Husband's gasp alerted Fio in time.
Deer are designed to be invisible. Their colors blend in with the woods, and they freeze when anything approaches, and, at the last moment, they bolt--across driveways, over fences, and onto roads,
It isn't so much that the cars hit the deer as that the deer hit the cars.